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Definition of Meta-analysis

Babylon English

technique or procedure of synthesizing the results of a research by combining the results of a number of independent studies
Meta-analysis Definition from Medicine Dictionaries & Glossaries
Glossary of Terms
Process of using statistical methods to combine the results of different studies. A frequent application is pooling the results from a set of randomized controlled trials, none of which alone is powerful enough to demonstrate statistical significance.
National Institutes of Health
The Glossary of the American Council on Science and Health
A method for statistically combining the findings of independent studies (usually published studies and usually many) into a group of conclusions.
Meta-analysis Definition from Society & Culture Dictionaries & Glossaries
Social Work in Canada
A statistical technique to combine information from many empirical studies on a topic to objectively estimate the reliability and overall size of the effect.
Meta-analysis Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
In statistics, a meta-analysis refers to methods that focus on contrasting and combining results from different studies, in the hope of identifying patterns among study results, sources of disagreement among those results, or other interesting relationships that may come to light in the context of multiple studies. In its simplest form, meta-analysis is normally done by identification of a common measure of effect size. A weighted average of that common measure is the output of a meta-analysis. The weighting is related to sample sizes within the individual studies. More generally there are other differences between the studies that need to be allowed for, but the general aim of a meta-analysis is to more powerfully estimate the true effect size as opposed to a less precise effect size derived in a single study under a given single set of assumptions and conditions. A meta-analysis therefore gives a thorough summary of several studies that have been done on the same topic, and provides the reader with extensive information on whether an effect exists and what size that effect has.

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